Tensioning sleeve for friction transmission

Abstract

The utility model discloses an expansion sleeve for friction transmission, which comprises a basic pipe, a friction block, an inner guide block, an outer guide block, a telescopic pipe, a lower inclined block, an upper inclined block and a propping rod, when the expansion sleeve needs to be expanded, the telescopic pipe is pushed through the propping rod, the telescopic pipe drives the lower inclined block to move axially, the lower inclined block and the upper inclined block move relatively, and the expansion sleeve is driven to rotate. The upper inclined block moves in the radial direction in the direction away from the axis of the basic pipe, so that the upper inclined block and the arc-shaped plate are jacked up, and the purpose of tensioning the coiled material paper core is achieved; when the tensioning sleeve needs to be shrunk, pushing force applied to the abutting rod is removed, the telescopic pipe axially moves in the reverse direction under the action of the elastic element, the lower inclined block and the upper inclined block move relatively, the upper inclined block moves in the radial direction towards the axis of the basic pipe, the arc-shaped plate is driven to be shrunk, and the purpose of loosening the coiled material paper core is achieved. The copper foil winding device can wind wide and heavy copper foils, solves the problems that winding tension jumps and winding is uneven, and is stable in structure, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of winding and unwinding equipment and peripheral supporting facilities thereof, in particular to a tensioning sleeve for friction transmission. Background Art

[0002] The shearing and winding of rolled copper foil generally adopts the form of tensioning with a tensioning sleeve. The paper core specifications are mostly 3 inches or 6 inches. Due to equipment limitations, the weight of a single piece is generally less than 200kg. The current market demand is copper foil of about 0.05mm, and the market demand for the weight of a single piece is more than 500kg. There is currently a winding form that uses a coiling disk (generally 10mm-16mm thick) to establish tension through friction. Its structure is mainly to tighten the active part on the coiling disk through bolts or cams to achieve the expansion of the inner ring of the paper core. However, this structure can only be used for narrow strips, small tension and small roll weight products. If the amplitude is widened and the tension increases, the coiling disk will slip relative to the paper core, and the tension will be unstable. Utility Model Content

[0003] The purpose of the utility model is to provide a tension sleeve for friction transmission to solve the problems existing in the above-mentioned related technologies, so that the tension sleeve can be used to wind wide and heavy copper foil under friction transmission, avoid the phenomena of winding tension jump and uneven winding, and improve the structural stability and working reliability of the tension sleeve.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides a tension sleeve for friction transmission, comprising:

[0006] A base pipe, with an inner guide block and an outer guide block connected to both ends of the base pipe respectively;

[0007] a friction block, the friction block being capable of connecting to a rotating shaft of a reeling and unreeling device and transmitting torque, the friction block being connected to the inner guide block, the rotating shaft of the reeling and unreeling device being capable of extending into the base pipe;

[0008] The cam is secured to the outer wall of the base tube and is adapted to engage the guide rails of the cam, wherein the cam is secured to the inner wall of the base tube and is adapted to engage the guide rails of the cam.

[0009] An action component includes a pressing rod, which is slidably connected to the outer guide block and presses against the telescopic tube.

[0010] Preferably, the tensioning assembly also includes a threaded tube and a locking nut, the threaded tube is connected to the end of the outer guide block away from the base tube, the locking nut is threadedly connected to the threaded tube, and the locking nut is abutted against the end of the locking rod away from the telescopic tube, and the locking nut can push the locking rod by axial movement relative to the threaded tube.

[0011] Preferably, the abutting rod includes a pushing rod and a pushing ring, the outer guide block has a guide hole adapted to the pushing rod, the pushing rod can slide through the guide hole and abut against the telescopic tube, and the pushing ring abuts against the abutting nut.

[0012] Preferably, the base pipe is threadedly connected to the inner guide block and the outer guide block respectively;

[0013] The inner guide block has a guide groove, which is arranged along the radial direction of the inner guide block. The upper inclined block has a sliding end adapted to the guide groove, and the sliding end is slidably arranged in the guide groove; the guide groove is dovetail-shaped.

[0014] Preferably, the bottom of the upper inclined block has a slider, the top of the lower inclined block has a slide groove adapted to the slider, the slider is slidably arranged in the slide groove, and the slider and the slide groove are both dovetail-shaped.

[0015] Preferably, the included angle between the sliding fitting surfaces of the upper inclined block and the lower inclined block and the axis of the base pipe is 60°.

[0016] Preferably, the arc-shaped plate is detachably connected to the upper inclined block.

[0017] Preferably, the arc-shaped plate is connected to the upper inclined block by bolts.

[0018] Preferably, there are multiple groups of lower inclined blocks, which are evenly distributed circumferentially around the axis of the telescopic tube, and the upper inclined blocks and the arc-shaped plates correspond one-to-one to the lower inclined blocks.

[0019] Preferably, the friction block is made of a fiberglass cloth material, and the friction block is connected to the inner guide block by a positioning pin.

[0020] Compared with the related art, the present invention has achieved the following technical effects: the friction transmission tensioning sleeve of the present invention comprises a base tube, a friction block, a tensioning assembly and an action assembly, wherein the two ends of the base tube are respectively connected with an inner guide block and an outer guide block; the friction block can be connected to the rotating shaft of the winding and unwinding device and transmit torque, the friction block is connected to the inner guide block, and the rotating shaft of the winding and unwinding device can extend into the base tube; the tensioning assembly comprises a telescopic tube, a lower inclined block and an upper inclined block, the telescopic tube can be slidably sleeved on the outside of the base tube, and the telescopic tube is located between the inner guide block and the outer guide block. An elastic element is provided between the telescopic tube and the inner guide block, the lower inclined block is connected to the telescopic tube, the upper inclined block is located on the top of the lower inclined block and the two are slidably connected, and the abutting surfaces of the upper inclined block and the lower inclined block are inclined surfaces, so that the upper inclined block produces radial displacement when sliding relative to the lower inclined block. An arc plate is connected to the side of the upper inclined block away from the lower inclined block, and the arc plate protrudes toward the side away from the axis of the base tube and can abut against the paper core of the roll; the inner guide block and the outer guide block can limit the extreme position of the tensioning assembly; the action assembly includes a tightening rod, which is slidably connected to the outer guide block and abuts against the telescopic tube.

[0021] The friction transmission tensioning sleeve of the present invention pushes the telescopic tube through the clamping rod when the tensioning sleeve needs to be expanded. The telescopic tube moves axially with the lower inclined block. The lower inclined block and the upper inclined block move relative to each other, causing the upper inclined block to move radially away from the axis of the base tube, thereby lifting the upper inclined block and the curved plate to achieve the purpose of tightening the paper core of the coil. When the tensioning sleeve needs to be retracted, the pushing force applied to the clamping rod is removed. The telescopic tube moves axially in the opposite direction under the action of the elastic element. The lower inclined block and the upper inclined block move relative to each other, causing the upper inclined block to move radially toward the axis of the base tube and driving the curved plate to retract, thereby achieving the purpose of loosening the paper core of the coil. The friction block of the present invention can be connected to the rotating shaft of the winding and unwinding device to transmit torque. The inner guide block and the outer guide block are respectively provided at the axial ends of the base tube to provide a limit and guide for the tensioning assembly. The friction transmission tensioning sleeve of the present invention can be used to wind wide and heavy copper foil, solving the problems of winding tension jump and uneven winding. The structure is stable, safe and reliable, which is conducive to improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of a friction transmission expansion sleeve disclosed in an embodiment of the present utility model;

[0024] Figure 2 A schematic cross-sectional view of a friction transmission expansion sleeve disclosed in an embodiment of the present utility model;

[0025] Figure 3 A side cross-sectional schematic diagram of a friction transmission expansion sleeve disclosed in an embodiment of the present utility model;

[0026] Figure 4 This is a schematic structural diagram of a base tube of a friction transmission expansion sleeve disclosed in an embodiment of the present utility model;

[0027] Figure 5 This is a schematic cross-sectional view of a base tube of a friction transmission expansion sleeve disclosed in an embodiment of the present utility model;

[0028] Figure 6 This is a schematic front view of a friction block of a tension sleeve for friction transmission disclosed in an embodiment of the present utility model;

[0029] Figure 7 A side view schematic diagram of a friction block of a tension sleeve for friction transmission disclosed in an embodiment of the present utility model;

[0030] Figure 8 This is a structural diagram of the inner guide block of the friction transmission tension sleeve disclosed in an embodiment of the present utility model;

[0031] Figure 9 This is a schematic cross-sectional view of the inner guide block of the friction transmission expansion sleeve disclosed in an embodiment of the present utility model;

[0032] Figure 10 This is a schematic structural diagram of the outer guide block of the friction transmission tension sleeve disclosed in an embodiment of the present utility model;

[0033] Figure 11 A schematic cross-sectional view of an outer guide block of a friction transmission tension sleeve disclosed in an embodiment of the present utility model;

[0034] Figure 12 This is a schematic structural diagram of a telescopic tube of a friction transmission expansion sleeve disclosed in an embodiment of the present utility model;

[0035] Figure 13 A schematic cross-sectional view of a telescopic tube of a friction transmission expansion sleeve disclosed in an embodiment of the present utility model;

[0036] Figure 14 This is a schematic structural diagram of the lower inclined block of the friction transmission tension sleeve disclosed in an embodiment of the present utility model;

[0037] Figure 15 for Figure 14 Schematic diagram of the section along AA direction;

[0038] Figure 16A schematic front view of an upper inclined block of a tension sleeve for friction transmission disclosed in an embodiment of the present utility model;

[0039] Figure 17 for Figure 16 Schematic diagram of the cross section along the BB direction;

[0040] Figure 18 A schematic top view of the upper inclined block of the friction transmission tension sleeve disclosed in an embodiment of the present utility model;

[0041] Figure 19 A schematic front view of a tightening rod of a tension sleeve for friction transmission disclosed in an embodiment of the present utility model;

[0042] Figure 20 A side view schematically showing a tightening rod of a tightening sleeve for friction transmission disclosed in an embodiment of the present utility model;

[0043] Figure 21 This is a structural diagram of a threaded tube of a friction transmission expansion sleeve disclosed in an embodiment of the present utility model;

[0044] Figure 22 This is a schematic cross-sectional view of a threaded tube of a friction transmission expansion sleeve disclosed in an embodiment of the present utility model;

[0045] Figure 23 This is a structural diagram of a tightening nut of a friction transmission expansion sleeve disclosed in an embodiment of the present utility model;

[0046] Figure 24 This is a schematic cross-sectional view of a tightening nut of a friction transmission expansion sleeve disclosed in an embodiment of the present utility model.

[0047] In the figure: 1. base tube; 2. friction block; 3. inner guide block; 301. guide groove; 4. outer guide block; 401. guide hole; 5. telescopic tube; 6. lower inclined block; 7. upper inclined block; 8. elastic element; 9. arc plate; 10. tightening rod; 1001. push rod; 1002. push ring; 11. threaded tube; 12. tightening nut. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] The purpose of the utility model is to provide a tension sleeve for friction transmission to solve the problems existing in the above-mentioned related technologies, so that the tension sleeve can be used to wind wide and heavy copper foil under friction transmission, avoid the phenomena of winding tension jump and uneven winding, and improve the structural stability and working reliability of the tension sleeve.

[0050] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0051] Example 1

[0052] This embodiment provides a friction transmission tension sleeve, please refer to Figure 1-Figure 24 , including a base tube 1, a friction block 2, a tensioning assembly and an action assembly, wherein the two ends of the base tube 1 are respectively connected to an inner guide block 3 and an outer guide block 4; the friction block 2 can be connected to the rotating shaft of the reeling and unwinding device and transmit torque, the friction block 2 is connected to the inner guide block 3, and the rotating shaft of the reeling and unwinding device can extend into the base tube 1; the tensioning assembly includes a telescopic tube 5, a lower inclined block 6 and an upper inclined block 7. The telescopic tube 5 is slidably sleeved on the outside of the base tube 1, the telescopic tube 5 is located between the inner guide block 3 and the outer guide block 4, and an elastic element 8 is provided between the telescopic tube 5 and the inner guide block 3. The lower inclined block 6 is connected to the telescopic tube 5, the upper inclined block 7 is located at the top of the lower inclined block 6 and the two are slidably connected, the abutting surface of the upper inclined block 7 and the lower inclined block 6 is an inclined surface, so that the upper inclined block 7 produces radial displacement when sliding relative to the lower inclined block 6, and the side of the upper inclined block 7 away from the lower inclined block 6 is connected to an arc plate 9, which protrudes toward the side away from the axis of the base tube 1 and can abut against the paper core of the coil; the inner guide block 3 and the outer guide block 4 can limit the extreme position of the tensioning assembly; the action assembly includes a tightening rod 10, which is slidably connected to the outer guide block 4 and abuts against the telescopic tube 5.

[0053] The friction transmission tensioning sleeve of the present invention pushes the telescopic tube 5 through the tightening rod 10 when the tensioning sleeve needs to be expanded. The telescopic tube 5 moves axially with the lower inclined block 6. The lower inclined block 6 and the upper inclined block 7 move relative to each other, so that the upper inclined block 7 moves radially in the direction away from the axis of the base tube 1, thereby lifting the upper inclined block 7 and the arc plate 9 to achieve the purpose of tightening the paper core of the coiled material; when the tensioning sleeve needs to be contracted, the driving force applied to the tightening rod 10 is removed, and the telescopic tube 5 moves axially in the opposite direction under the action of the elastic element 8. The lower inclined block 6 and the upper inclined block 7 move relative to each other, so that the upper inclined block 7 moves radially in the direction toward the axis of the base tube 1 and drives the arc plate 9 to retract, so as to achieve the purpose of loosening the paper core of the coiled material. The friction block 2 of the utility model can be connected to the rotating shaft of the winding and unwinding equipment to transmit torque. The inner guide block 3 and the outer guide block 4 are respectively provided at the axial ends of the base tube 1, which provide limit and guidance for the tensioning component. The friction transmission tensioning sleeve of the utility model can wind up wide and heavy copper foil, solving the problems of winding tension jump and uneven winding. The structure is stable, safe and reliable, which is conducive to improving production efficiency.

[0054] Specifically, the tensioning assembly also includes a threaded tube 11 and a retaining nut 12. The threaded tube 11 is connected to the end of the outer guide block 4 away from the base tube 1. The retaining nut 12 is threadedly connected to the threaded tube 11 and abuts against the end of the retaining rod 10 away from the telescopic tube 5. The retaining nut 12 can move axially relative to the threaded tube 11 to push the retaining rod 10. By turning the retaining nut 12 with a wrench or other tool, the telescopic tube 5 can be pushed, achieving expansion and contraction of the curved plate 9, thereby improving the ease of operation of the tensioning sleeve.

[0055] The abutting rod 10 includes a push rod 1001 and a push ring 1002. The outer guide block 4 has a guide hole 401 that matches the push rod 1001. The push rod 1001 can slide through the guide hole 401 and then abut against the telescopic tube 5. The push rod 1001 cooperates with the guide hole 401 to provide a guide for the abutting rod 10 to push the telescopic tube 5, thereby improving the movement reliability of the telescopic tube 5. The push ring 1002 abuts against the abutting nut 12, which facilitates the pushing of the abutting rod 10 while improving the uniformity of the force applied to the abutting rod 10. In this specific embodiment, there are multiple push rods 1001, and the multiple push rods 1001 are evenly distributed circumferentially around the axis of the push ring 1002.

[0056] In this embodiment, the base tube 1 is threadedly connected to the inner guide block 3 and the outer guide block 4, respectively, for a secure connection and easy assembly and disassembly. To further improve the reciprocating sliding precision of the telescopic tube 5, in actual applications, a matching sliding key and keyway can be provided between the base tube 1 and the telescopic tube 5 to enable stable relative axial movement and prevent relative slippage when excessive tension is applied.

[0057] Similarly, to improve the reciprocating accuracy of the upper inclined block 7, the inner guide block 3 has a guide groove 301 arranged along the radial direction of the inner guide block 3. The upper inclined block 7 has a sliding end adapted to the guide groove 301 and slidably disposed within the guide groove 301, thereby improving the sliding reliability of the upper inclined block 7. In actual application, the guide groove 301 is dovetail-shaped, which can effectively prevent the upper inclined block 7 from slipping. In this specific embodiment, the angle of the dovetail-shaped guide groove 301 is 10°. In actual application, it can be adjusted according to actual working conditions to reduce the processing difficulty.

[0058] Similarly, the bottom of the upper inclined block 7 has a slider, and the top of the lower inclined block 6 has a slide groove that matches the slider. The slider is slidably disposed within the slide groove, and both the slider and the slide groove are dovetail-shaped. The slider and the slide groove are provided between the upper inclined block 7 and the lower inclined block 6 to ensure the reliability of the sliding connection between the upper inclined block 7 and the lower inclined block 6. It should be noted that in actual applications, the slide groove can also be provided at the bottom of the upper inclined block 7 and the slider can be provided at the top of the lower inclined block 6.

[0059] In this specific embodiment, the angle between the sliding fitting surfaces of the upper inclined block 7 and the lower inclined block 6 and the axis of the base pipe 1 is 60° to control the radial movement distance of the upper inclined block 7 along the base pipe 1. In actual application, the inclination angle of the sliding fitting surfaces of the upper inclined block 7 and the lower inclined block 6 can be adjusted according to the specific working conditions to meet the tightening and contraction requirements of the expansion sleeve.

[0060] In order to facilitate disassembly and assembly, the arc plate 9 is detachably connected to the upper inclined block 7. The arc plate 9 can be made by cutting a whole round tube, and the outer side surface is an arc surface. When installed on the upper inclined block 7, it can better fit the inner wall of the roll paper core.

[0061] In other achievable embodiments of the present invention, the curved plates 9 are bolted to the upper inclined block 7 for easy assembly and disassembly, allowing replacement of curved plates 9 of different specifications according to the specifications of the paper core. To prevent the curved plates 9 from rotating and misaligning, each curved plate 9 can be connected to the upper inclined block 7 using multiple sets of bolts to ensure connection stability.

[0062] In order to improve the uniformity of the tensioning of the tensioning sleeve, the number of lower inclined blocks 6 is multiple, and the lower inclined blocks 6 are evenly distributed circumferentially around the axis of the telescopic tube 5. The upper inclined blocks 7 and the arc-shaped plates 9 correspond one-to-one with the lower inclined blocks 6 to achieve uniform expansion and contraction of the tensioning sleeve, which can effectively improve the uniformity of the force on the paper core of the coil and ensure the working reliability of the tensioning sleeve for friction transmission.

[0063] In this specific embodiment, the elastic element 8 can be a spring, which is sleeved on the outside of the base pipe 1 and is cheap and easy to assemble and disassemble.

[0064] More specifically, the friction block 2 is made of fiberglass cloth, which is wear-resistant and heat-resistant, making it suitable for use in situations where friction creates tension and ensuring smooth torque transmission. The friction block 2 is connected to the inner guide block 3 using a locating pin. It should also be noted that in this embodiment, the inner diameter of the friction block 2 is smaller than that of the base pipe 1 to prevent the tensioning sleeve from wearing the reel's rotating shaft during installation and operation.

[0065] It should also be noted that the inner guide block 3, base tube 1, outer guide block 4, telescopic tube 5, upper inclined block 7, lower inclined block 6, and curved plate 9 are all made of 40Cr, a wear-resistant and high-strength material that enhances the operating safety of the expansion sleeve. Furthermore, the threaded tube 11, retaining rod 10, and retaining nut 12 are constructed from 45-gauge steel, which has excellent mechanical properties. All components undergo heat treatment for enhanced strength, further enhancing the reliability of the expansion sleeve.

[0066] The friction transmission tensioning sleeve of the utility model effectively improves the problem that the lengths of the copper foil (especially the soft blank) are inconsistent when the copper foil is slit under the same transmission conditions, resulting in the fluctuation of the winding tension and uneven winding. It also solves the problem of heavy weight curling and relative slippage of the existing expansion and contraction disk when wide-width shearing under friction transmission conditions.

[0067] Example 2

[0068] This embodiment provides a winding and unwinding device, including the tension sleeve for friction transmission of the first embodiment.

[0069] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A tension sleeve for friction transmission, characterized in that: include: A base pipe (1), wherein both ends of the base pipe (1) are respectively connected to an inner guide block (3) and an outer guide block (4); A friction block (2), the friction block (2) being capable of being connected to a rotating shaft of a reeling and unreeling device and transmitting torque, the friction block (2) being connected to the inner guide block (3), and the rotating shaft of the reeling and unreeling device being capable of extending into the base pipe (1); A tensioning assembly, the tensioning assembly comprising a telescopic tube (5), a lower inclined block (6) and an upper inclined block (7), the telescopic tube (5) being slidably sleeved on the outside of the base tube (1), the telescopic tube (5) being located between the inner guide block (3) and the outer guide block (4), and an elastic element (8) being provided between the telescopic tube (5) and the inner guide block (3), the lower inclined block (6) being connected to the telescopic tube (5), and the upper inclined block (7) being located on the top of the lower inclined block (6) The two are slidably connected, and the contact surface between the upper inclined block (7) and the lower inclined block (6) is an inclined surface, so that the upper inclined block (7) generates radial displacement when sliding relative to the lower inclined block (6); the side of the upper inclined block (7) away from the lower inclined block (6) is connected to an arc plate (9), and the arc plate (9) is protruding toward the side away from the axis of the base tube (1) and can abut against the coil paper core; the inner guide block (3) and the outer guide block (4) can limit the extreme position of the tensioning component; An action component comprises a pressing rod (10), wherein the pressing rod (10) is slidably connected to the outer guide block (4) and presses against the telescopic tube (5).

2. The friction transmission tension sleeve according to claim 1, characterized in that: The tensioning assembly further comprises a threaded tube (11) and a locking nut (12), wherein the threaded tube (11) is connected to the end of the outer guide block (4) away from the base tube (1), the locking nut (12) is threadedly connected to the threaded tube (11), and the locking nut (12) abuts against the end of the locking rod (10) away from the telescopic tube (5), and the locking nut (12) can push the locking rod (10) by axially moving relative to the threaded tube (11).

3. The friction transmission tension sleeve according to claim 2, characterized in that: The abutting rod (10) comprises a pushing rod (1001) and a pushing ring (1002); the outer guide block (4) has a guide hole (401) adapted to the pushing rod (1001); the pushing rod (1001) can slide through the guide hole (401) and abut against the telescopic tube (5); the pushing ring (1002) abuts against the abutting nut (12).

4. The friction transmission tension sleeve according to claim 1, characterized in that: The base pipe (1) is threadedly connected to the inner guide block (3) and the outer guide block (4) respectively; The inner guide block (3) has a guide groove (301), and the guide groove (301) is arranged along the radial direction of the inner guide block (3); the upper inclined block (7) has a sliding end adapted to the guide groove (301), and the sliding end is slidably arranged in the guide groove (301); the guide groove (301) is dovetail-shaped.

5. The friction transmission tension sleeve according to any one of claims 1 to 4, characterized in that: The bottom of the upper inclined block (7) is provided with a slider, and the top of the lower inclined block (6) is provided with a slide groove adapted to the slider. The slider is slidably arranged in the slide groove, and both the slider and the slide groove are dovetail-shaped.

6. The friction transmission tension sleeve according to claim 5, characterized in that: The included angle between the sliding fitting surfaces of the upper inclined block (7) and the lower inclined block (6) and the axis of the base pipe (1) is 60°.

7. The friction transmission tension sleeve according to claim 1, characterized in that: The arc-shaped plate (9) is detachably connected to the upper inclined block (7).

8. The friction transmission tension sleeve according to claim 7, characterized in that: The arc-shaped plate (9) is connected to the upper inclined block (7) by bolts.

9. The friction transmission tension sleeve according to claim 1, characterized in that: The number of the lower inclined blocks (6) is multiple, and the lower inclined blocks (6) are evenly distributed circumferentially around the axis of the telescopic tube (5), and the upper inclined blocks (7) and the arc-shaped plates (9) correspond one to one with the lower inclined blocks (6).

10. The friction transmission tension sleeve according to any one of claims 1 to 4, characterized in that: The friction block (2) is made of a glass fiber cloth board material, and the friction block (2) is connected to the inner guide block (3) by using a positioning pin.

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